InChI=1S/C21H20O12/c22-9-5-11(23)13-12(6-9)33-21(30,18(13)27)7-8-2-1-3-10(4-8)31-20-16(26)14(24)15(25)17(32-20)19(28)29/h1-6,14-17,20,22-26,30H,7H2,(H,28,29)